#include "QProgressIndicator.h"

#include <QPainter>
#include <QTimer>
QProgressIndicator::QProgressIndicator(QWidget* parent)
        : QWidget(parent),
        m_angle(0),
        m_timerId(-1),
        m_delay(40),
        m_displayedWhenStopped(false),
        m_color(Qt::white)
{
    setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);    
    m_Timer = new QTimer(this);
    connect(m_Timer,SIGNAL(timeout()),this,SLOT(play()));
}

bool QProgressIndicator::isAnimated () const
{
    return (m_timerId != -1);
}

void QProgressIndicator::setDisplayedWhenStopped(bool state)
{
    m_displayedWhenStopped = state;
    repaint();
}

bool QProgressIndicator::isDisplayedWhenStopped() const
{
    return m_displayedWhenStopped;
}

void QProgressIndicator::startAnimation()
{
    m_angle = 0;

    m_Timer->start(m_delay);
}

void QProgressIndicator::stopAnimation()
{
    m_Timer->stop();
    repaint();
}

void QProgressIndicator::setAnimationDelay(int delay)
{
    m_Timer->stop();

    m_delay = delay;

    m_Timer->start(m_delay);
}

void QProgressIndicator::setColor(const QColor & color)
{
    m_color = color;

    repaint();
}

QSize QProgressIndicator::sizeHint() const
{
    return QSize(20,20);
}

int QProgressIndicator::heightForWidth(int w) const
{
    return w;
}

void QProgressIndicator::play()
{
    m_angle = (m_angle+30)%360;
    repaint();
}

void QProgressIndicator::paintEvent(QPaintEvent * /*event*/)
{
    int width = qMin(this->width(), this->height());   
    QPainter p(this);
    p.setRenderHint(QPainter::Antialiasing);
    int outerRadius = (width-1)*0.5;
    int innerRadius = (width-1)*0.5*0.38;

    int capsuleHeight = outerRadius - innerRadius;
    int capsuleWidth  = (width > 32 ) ? capsuleHeight *.23 : capsuleHeight *.35;
    int capsuleRadius = capsuleWidth/2;

    for (int i=0; i<12; i++)
    {
        QColor color = m_color;
        color.setAlphaF(1.0f - (i/12.0f));
        p.setPen(Qt::NoPen);
        p.setBrush(color);
        p.save();
        p.translate(rect().center());
        p.rotate(m_angle - i*30.0f);
        p.drawRoundedRect(-capsuleWidth*0.5, -(innerRadius+capsuleHeight), capsuleWidth, capsuleHeight, capsuleRadius, capsuleRadius);
        p.restore();
    }
}
